vi CONTENTS. 



ART. 



XIX. Experimental Researches on the Lifting Power of the Electro-Magnet. 

 Part II. Temperature Correction ; Effects of Spirals and Helices. 

 By the Rev. T. R. Robinson, D. D.. President of the Royal Irish 

 Academy, and Member of other Scientific Societies. Read June 26, 



1854 



XX. Some Account of the Marine Botany of the Colony of Western Aus- 

 tralia. By AV. H. Harvey, M. Z>., M. R. I. A.. Keeper of the Her- 

 barium, of the University of Dublin, and Professor of Botany to the 

 Royal Dublin Society, ^c. Read December 11, 1854 525 



499 



